North Aurora, IL 60542 Frost Dates
Frost dates for North Aurora, IL, ZIP 60542
Typically, the last spring freeze lands around 04/19, roughly 234 days out. The first fall frost typically arrives around 10/23, about 185 frost-free days later.
The USDA Plant Hardiness Zone Map puts North Aurora in Zone 5b (-15 to -10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 5b around North Aurora has about 8 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around North Aurora's last frost
04/19 is the middle of 30 years of NOAA records, not a promise. Plant by 04/05 and you're betting against frost in roughly 9 years out of 10. 05/04 is the safer bet, historically only a 1-in-10 chance of frost that late.
How North Aurora compares
About 185 days separate North Aurora's last and first frost, putting it 23,080 of 40,283 ZIP codes nationally. Within IL, it ranks 826 of 1,548.
Learn more
local microclimates explains what one yard in North Aurora can differ from the 60542 normal, and zone vs. frost date explains why Zone 5b and North Aurora's frost date answer different questions.